Ehrliche Sephardi Rabonim (ok,ok) I know do not refer to names of Sephardi politicians like that, from which I deduce, they are not holding them in high esteem.
My understanding of the situation is that the new Knesset changed the law to allow Deri to sit in Knesset, but Supreme Court invalidated that rule. Supposedly, without having solid bias for doing that.
We know 2 successful democratic systems around us – US with constitution, and UK with Parliament as Sovereign. While Jewish ideal polity seem to include strong courts, this presumes Torah-based courts, with Torah creating a standard similar to Constitution in US. As Israeli courts do not have such structure, they seem to rely on their personal (possibly biased) feeling of justice, in effect having a small unelected group having unlimited powers. This does not look like a good idea to me.